by David Jackson, USA TODAY

by David Jackson, USA TODAY

Add former Homeland Security secretary Janet Napolitano to the list of those who oppose clemency for Edward Snowden.

Napolitano told NBC's Meet The Press that Snowden -- who leaked details of National Security Agency surveillance programs, and has been granted asylum in Russia - should stand trial in the United States.

"Snowden has exacted quite a bit of damage and did it in a way that violated the law," Napolitano told NBC. "I think he's committed crimes and I think that the damage we'll see now and we'll see it for years to come."

Supporters of Snowden have urged President Obama to grant clemency, calling the former NSA contractor a whistle-blower who exposed government abuse of surveillance programs.

Current Obama officials have objected to any kind of pardon.

Napolitano, who left the Homeland Security Department last year to become president of the University of California system, said on Meet The Press: "From where I sit today, I would not put clemency on the table at all ... I would rule it out. He has, by individual fiat, leaked very extensive information."

"She said that when she served as Homeland Security secretary, President Barack Obama was 'very clear with me' that 'there needed to be discussion and open dialogue about the balance between privacy and our privacy values then and security. And remember, these are both important values. There is a right balance to be struck here.'

"But Snowden, she said, 'just decided to go off on his own. And he did exact quite a bit of damage in my judgment.'"